I also have a S and a D and saw differences in how they were treated in middle and high school. But by far one of the biggest differences I observed is how differently male peers and female peers interacted - something I feel has a huge impact on confidence and how one develops psychologically. In very general terms, males supported and defended each other while females criticized each other and attempted to drag each other down. I observed that both in athletics and on a social level.
For young girls, outside of their most intimate friend group they really had to watch their backs. For my S there just seemed to be a lot more visible support from peers.